Uruguay River, river in southern South America that rises in the coastal range of southern Brazil. Its chief headstream, the Pelotas River, rises just 40 miles (64 km) from the Atlantic coast at Alto do Bispo in Santa Catarina state, Brazil, and takes the name Uruguay after it is joined by the

Xingu River, river in Mato Grosso and Pará states, Brazil. The river rises on the Planalto (plateau) do Mato Grosso, in the drainage basin framed by the Serra do Roncador and the Serra Formosa mountain ranges. Formed by several headstreams, principally the Curiseu, Batovi, and Romuro rivers, the

Yaqui River, river in Sonora state, northwestern Mexico. Formed in the Sierra Madre Occidental by the junction of the Bavispe and Papigochi rivers near the U.S. border, the Yaqui flows generally southward and westward through Sonora for approximately 200 miles (320 km), crossing the coastal plain

microglia: …and 1921 by Spanish neuroanatomist Pio del Rio-Hortega, who was a student of Spanish histologist Santiago Ramón y Cajal, best known for his work in establishing neurons as the basic units of nervous tissue.

Rio de Janeiro: The economy: The Rio-Niterói Bridge, which is about 9 miles (14.5 km) long, connects the city of Rio de Janeiro with Niterói, located on the east side of Guanabara Bay. The state has two major airports: Santos Dumont, on Guanabara Bay within the city of Rio; and Galeão,…

Riobamba, city, central Ecuador. It is situated in the central highlands of the Andes Mountains at an elevation of about 9,000 feet (2,700 metres) in the basin of the Riobamba River, just south of Chimborazo (Ecuador’s highest peak). The surrounding region was densely settled in pre-Inca and Inca

butterfly: Major families: Riodinidae, the metalmarks, found chiefly in the American tropics. Nymphalidae, the brush-footed butterflies, the largest and most diverse family. The group include such popular butterflies as the admirals, fritillaries, monarchs, zebras, and

metalmark, (subfamily Riodininae), any of a group of small, principally South American insects in the gossamer-winged butterfly family, Lycaenidae (order Lepidoptera), that are named for characteristic metallic wing markings. Metalmarks are difficult to recognize because many species mimic other

Ríohacha, capital of La Guajira departamento, northern Colombia. It lies on the Caribbean coast at the mouth of the Ranchería River. Founded in 1545, the settlement became known for its pearl industry. After the depletion of the oyster beds in the 18th century, the town declined until it was named

human eye: The muscles of the lids: …names—namely, Horner’s muscle and the muscle of Riolan; they come into close relation with the lacrimal apparatus and assist in drainage of the tears. The muscle of Riolan, lying close to the lid margins, contributes to keeping the lids in close apposition. The orbital portion of the orbicularis is not…

William Harvey: Discovery of circulation: …circulation theory by French anatomist Jean Riolan.

Riom, town, Puy-de-Dôme département, Auvergne-Rhône-Alpes région, central France. It lies along the Ambène River at the western edge of the fertile Limagne Plain, just north of Clermont-Ferrand. The old town, built around the ancient Church of Saint-Amable, is ringed by wide boulevards. In the

Jean-Paul Riopelle was a Canadian painter and sculptor who was widely regarded as Canada’s most important modern artist. His work, much of which was done in the Abstract Expressionist style, was often compared to that of American artist Jackson Pollock. After studying painting at the École des

Rick Riordan is an American author and teacher who was perhaps best known for his hugely popular Percy Jackson and the Olympians book series, which blends Greek mythology with modern-day characters and settings. Riordan attended North Texas State University (now University of North Texas) in Denton

Rick Riordan is an American author and teacher who was perhaps best known for his hugely popular Percy Jackson and the Olympians book series, which blends Greek mythology with modern-day characters and settings. Riordan attended North Texas State University (now University of North Texas) in Denton

Trinidad: Two large natural areas, Ríos Blanco y Negro Wildlife Reserve and Noel Kempff Mercado National Park—the latter designated a UNESCO World Heritage site in 2000—lie to the east of the city.

Efraín Ríos Montt was a Guatemalan army general and politician who ruled Guatemala as the leader of a military junta and as dictator (1982–83). In 2013 he was tried by a Guatemalan court on charges of genocide and crimes against humanity, marking the first time that a former head of government was

Efraín Ríos Montt was a Guatemalan army general and politician who ruled Guatemala as the leader of a military junta and as dictator (1982–83). In 2013 he was tried by a Guatemalan court on charges of genocide and crimes against humanity, marking the first time that a former head of government was

José María Arguedas: Literary and anthropological career: …and Los ríos profundos (1958; Deep Rivers), expanded on these concerns through detailed portrayals of Indigenous life and the social divisions that structure Peruvian society.

Chile: The presidencies of Aguirre Cerda and Ríos: …of Aguirre Cerda (1938–41) and Juan Antonio Ríos (1942–46). Aguirre Cerda represented the middle class; his triumph came through the support of a popular front, which included the Radical, Socialist, and Communist parties and also the left-inspired Confederation of Chilean Workers.

riot, in criminal law, a violent offense against public order involving three or more people. Like an unlawful assembly, a riot involves a gathering of persons for an illegal purpose. In contrast to an unlawful assembly, however, a riot involves violence. The concept is obviously broad and embraces

Pearl Jam: Vitalogy through Pearl Jam: The politically charged Riot Act (2002) was a solid rock album, but its intensity does not approach the eponymous Pearl Jam (2006). Critics and fans embraced the latter album’s return to the arena-rock sound of Vs. Singles such as “World Wide Suicide,” in particular, recall the anger and…

In the early 1990s Kathleen Hanna, lead singer of the punk rock group Bikini Kill, made it a practice to begin gigs with the command, “Girls to the front!” Hanna’s experience was that women in the punk scene were often pushed aside by male fans and musicians. In her 2024 memoir, Rebel Girl: My Life

Riot in Cell Block 11, American low-budget crime film, released in 1954, that offers a critical look at the prison system in the United States. It was inspired by a real-life Hollywood incident. A group of convicts—led by James Dunn (played by Neville Brand) and Crazy Mike Carnie (Leo Gordon)—stage

the Coasters: …Leiber and Mike Stoller (“Riot in Cell Block No. 9” and “Smokey Joe’s Cafe”). In 1955, with a change in personnel (most notably the loss of Richard Berry, who would later write the rock classic “Louie, Louie”), they became the Coasters. The group had a series of rock-and-roll hits—largely…

Umberto Boccioni: Boccioni’s first major Futurist painting, Riot in the Gallery (1909), remained close to pointillism and showed an affiliation with Futurism mainly in its violent subject matter and dynamic composition. The City Rises (1910–11), however, is an exemplary Futurist painting in its representation of dynamism, motion, and speed. The swirling human…

chemical weapon: Riot-control agents: Tear gas and vomiting agents have been produced to control riots and unruly crowds. Commonly used tear gases are chloracetophenone (CN), chloropicrin (PS), dibenz(b,f)(1,4)oxazepine (CR), and o-chlorobenzylidenemalononitrile (CS). CN, the

Riotinto Mines, copper mines located on the Tinto River near the town of Nerva (formerly Riotinto), in Huelva provincia (province), in the comunidad autónoma (autonomous community) of Andalusia, southwestern Spain. The mines (the name of which means “stained river” and refers to the pollution

rip current, narrow jetlike stream of water that flows sporadically seaward for several minutes, in a direction normal or nearly normal to a beach. Such currents are probably the cause of most ocean bathing accidents blamed on undertow. The term riptide is often used but is a misnomer, the currents

balloon flight: The rip panel and drag rope: Most of the features of the classic free balloon were included in Charles’s first machine. Important later additions were the rip panel, first used on April 27, 1839, by the American aeronaut John Wise, and the drag rope, invented about…

rip current, narrow jetlike stream of water that flows sporadically seaward for several minutes, in a direction normal or nearly normal to a beach. Such currents are probably the cause of most ocean bathing accidents blamed on undertow. The term riptide is often used but is a misnomer, the currents

Rip Van Winkle, short story by Washington Irving, published in The Sketch Book in 1819–20. Though set in the Dutch culture of pre-Revolutionary War New York state, the story of Rip Van Winkle is based on a German folktale. It and Irving’s “The Legend of Sleepy Hollow” have been called the first

Robert Planquette: Rip Van Winkle (1882), his second most popular work, was first performed in London and subsequently given in Paris as Rip-Rip. The libretto is an adaptation by H.B. Farne of Washington Irving’s tale. Les Voltiguers de la 32e (1880) had a long run in London…

Robert Planquette: Rip Van Winkle (1882), his second most popular work, was first performed in London and subsequently given in Paris as Rip-Rip. The libretto is an adaptation by H.B. Farne of Washington Irving’s tale. Les Voltiguers de la 32e (1880) had a long run in London…

iconography: …famous of these works is Cesare Ripa’s Iconologia (1593). Extensive iconographical study did not begin in Europe until the 18th century, however, when, as a companion to archaeology, it consisted of the classification of subjects and motifs in ancient monuments.

Ryan Seacrest: In 2017 he joined Kelly Ripa as cohost of the daytime talk show Live with Kelly, which was subsequently renamed Live with Kelly and Ryan. He left that show in 2023, but in 2024 took over from Pat Sajak as the host of the popular game show Wheel of…

Chinese architecture: The Qing dynasty (1644–1911/12): …made by the Jesuit father Matteo Ripa in 1712–13 and taken by him to London in 1724 are thought to have influenced the revolution in garden design that began in Europe at about this time. Near the Zhengde palace were built several imposing Buddhist temples in a mixed Sino-Tibetan style…

martin: The sand martin, or bank swallow (Riparia riparia), a 12-centimetre (5-inch) brown and white bird, breeds throughout the Northern Hemisphere; it makes nest burrows in sandbanks. The house martin (Delichon urbica), blue-black above and white-rumped, is common in Europe. The African river martin (Pseudochelidon eurystomina) of…

riparian right, in property law, doctrine pertaining to properties adjacent to a waterway that (a) governs the use of surface water and (b) gives all owners of land contiguous to streams, lakes, and ponds equal rights to the water, whether the right is exercised or not. The riparian right is

Keith Urban: Marriage to Nicole Kidman and later albums: Closer (2010), Fuse (2013), Ripcord (2016), Graffiti U (2018), and The Speed of Now Part 1 (2020).

judicial restraint: ) Similarly, the doctrine of ripeness prevents plaintiffs from seeking judicial relief while a threatened harm is merely conjectural, and the doctrine of mootness prevents judges from deciding cases after a dispute has concluded and legal resolution will have no practical effect.

hydrocarbon: Natural occurrence: …once formed, ethylene stimulates the ripening of fruits.

dairy product: Ripening: Most cheese is ripened for varying amounts of time in order to bring about the chemical changes necessary for transforming fresh curd into a distinctive aged cheese. These changes are catalyzed by enzymes from three main sources: rennet or other enzyme preparations of animal…

Édouard Glissant: The Ripening) won him France’s Prix Théophraste Renaudot (1958), an important annual award bestowed upon a novel. In Le Quatrième Siècle (1964; “The Fourth Century”), he retraced the history of slavery in Martinique and the rise of a generation of young West Indians, trained in…

Meridel Le Sueur: …Harvest: Collected Stories (1977); and Ripening: Selected Work, 1927–80 (1982).

Juan Guillermo Riperdá, duque de Riperdá was a political adventurer and Spanish minister during the reign of Philip V. Apparently born a Roman Catholic of a noble family, he conformed to Dutch Calvinism in order to obtain his election as delegate to the States General from Groningen. In 1715 he was

Juan Guillermo Riperdá, duque de Riperdá was a political adventurer and Spanish minister during the reign of Philip V. Apparently born a Roman Catholic of a noble family, he conformed to Dutch Calvinism in order to obtain his election as delegate to the States General from Groningen. In 1715 he was

Maya Rudolph: Early life and career: …youngest child of rhythm-and-blues singer-songwriter Minnie Riperton and record producer Richard Rudolph. Riperton’s hit song “Lovin’ You,” which reached number one on the Billboard Hot 100 chart in 1975, was written by Riperton and Richard Rudolph as a lullaby for their daughter—as the song fades out, repetitive la, las and…

bromegrass: Cheatgrass, ripgut grass (B. diandrus), and foxtail brome (B. rubens) are dangerous to grazing animals; spines on their spikelets or bracts can puncture the animals’ eyes, mouths, and intestines, leading to infection and possible death.

Precambrian: Orogenic belts: The Riphean sequence spans the period from 1.6 billion to 800 million years ago and occurs primarily in Russia. The Sinian sequence in China extends from 800 to 570 million years ago, toward the end of the Precambrian time. The sediments are terrigenous debris characterized by…

concerto grosso: The ripieno normally consisted of a string orchestra with continuo, often augmented by woodwinds or brass instruments.

Raymond Deane: … (1997–98); and the critically acclaimed Ripieno (1998–99), which premiered with the National Symphony Orchestra of Ireland in 2000. During the 1990s Deane also became increasingly outspoken on behalf of the largely unrecognized contemporary Irish composers. (He had become a member of Aosdána, the state-sponsored association of Irish artists, in 1986.)…

Cal Ripken, Jr. is a former baseball player, one of the most durable in professional sports history. On September 6, 1995, Ripken played his 2,131st consecutive game for the American League Baltimore Orioles and thereby broke Lou Gehrig’s major league record of consecutive games played. Gehrig’s

Cal Ripken, Jr.: His father, Cal Ripken, Sr., was an Orioles coach for 15 years and briefly managed the team. In 1987 Cal, Sr., became the first father ever to manage two sons in a major league game: Cal, Jr., and Billy, an infielder.

Cal Ripken, Jr. is a former baseball player, one of the most durable in professional sports history. On September 6, 1995, Ripken played his 2,131st consecutive game for the American League Baltimore Orioles and thereby broke Lou Gehrig’s major league record of consecutive games played. Gehrig’s

Andrew Scott: Later roles: …the antihero Tom Ripley in Ripley, Netflix’s stylish adaption of The Talented Mr. Ripley, which was Patricia Highsmith’s first novel featuring the character. The miniseries was critically praised, receiving 13 Emmy nominations, including a nod to Scott (it won four awards, notably for directing and cinematography). In 2025 he was…

Tom Ripley: …books about the character include Ripley Under Ground (1970), Ripley’s Game (1974), and The Boy Who Followed Ripley (1980).

Patricia Highsmith: …Who Followed Ripley (1980), and Ripley Under Water (1991). Several novels in the Ripley series were adapted for TV and film; notable among these are Plein soleil (1960; Purple Noon), starring Alain Delon as Ripley, The Talented Mr. Ripley (1999), with Matt Damon in the title role, and Ripley (2024),…

Tom Ripley: …include Ripley Under Ground (1970), Ripley’s Game (1974), and The Boy Who Followed Ripley (1980).

Thunder Road: Production notes and credits:

George Ripley was a journalist and reformer whose life, for half a century, mirrored the main currents of American thought. He was the leading promoter and director of Brook Farm (q.v.), the celebrated utopian community at West Roxbury, Mass., and a spokesman for the utopian socialist ideas of the

Julia Caroline Ripley Dorr was an American novelist and poet, notable for her novels that portrayed young women lifting themselves from poverty through education and persistence. Julia Ripley married Seneca M. Dorr in 1847. She had enjoyed writing verse since childhood, but none had ever been

Robert L. Ripley was an American cartoonist who created “Believe It or Not!,” a widely popular newspaper cartoon presenting bizarre facts and oddities of all kinds. Ripley claimed different birth years—1891, 1892, 1893, 1894—but census records, his gravestone, and family photos confirm 1890,

Rhea Ripley is an Australian professional wrestler with World Wrestling Entertainment (WWE; 2017– ) known for her distinctive metalhead aesthetic and her physical strength in the ring. Her signature move is the Riptide. Bennett was involved in multiple sports as a child, including rugby, swimming,

Robert L. Ripley was an American cartoonist who created “Believe It or Not!,” a widely popular newspaper cartoon presenting bizarre facts and oddities of all kinds. Ripley claimed different birth years—1891, 1892, 1893, 1894—but census records, his gravestone, and family photos confirm 1890,

Robert L. Ripley was an American cartoonist who created “Believe It or Not!,” a widely popular newspaper cartoon presenting bizarre facts and oddities of all kinds. Ripley claimed different birth years—1891, 1892, 1893, 1894—but census records, his gravestone, and family photos confirm 1890,

Tom Ripley, fictional hero-villain of a series of psychologically acute crime novels by American writer Patricia Highsmith. An engagingly suave psychopathic murderer, Tom Ripley evokes conflicting feelings of fear and trust in other characters as well as in the reader. His “talent” is his ability

W. Z. Ripley was an American economist and anthropologist whose book The Races of Europe: A Sociological Study (1899) directed the attention of American social scientists to the existence of subdivisions of “geographic races.” Specifically, Ripley asserted that the European Caucasians can be

W. Z. Ripley was an American economist and anthropologist whose book The Races of Europe: A Sociological Study (1899) directed the attention of American social scientists to the existence of subdivisions of “geographic races.” Specifically, Ripley asserted that the European Caucasians can be

Shakira is a Colombian singer, songwriter, musician, and dancer who built a successful career in both Spanish- and English-speaking markets to become one of the most popular Latin American recording artists of the early 21st century. Shakira, the daughter of a Lebanese father and a Colombian

Ripon, city, Fond du Lac county, east-central Wisconsin, U.S. It lies 20 miles (30 km) west of Fond du Lac and 80 miles (130 km) northwest of Milwaukee. In 1844 the Wisconsin Phalanx, a group of followers of the 19th-century French socialist philosopher Charles Fourier, organized a communal

Ripon, cathedral city, Harrogate borough, administrative county of North Yorkshire, historic county of Yorkshire, northern England. It lies in the upper valley of the River Ure, 27 miles (43 km) north of Leeds. St. Eata, abbot of Melrose, founded a Celtic monastery there about 651. About 10 years

Ripon: …schoolhouse on the campus of Ripon College (founded in 1851, opened as a preparatory school in 1853, and reorganized as a college in 1863), antislavery members of the Democratic, Whig, and Free-Soil parties held a meeting at which a new political party was proposed. This was the origin of the…

Ripon Falls, falls located on the Victoria Nile at Jinja, Ugan., just below the river’s outlet from Lake Victoria. About 16 feet (5 metres) high and 900 feet (275 metres) wide, they have been submerged by the Nalubaale (formerly Owen Falls) Dam, completed in 1954. The falls were visited by the

Frederick John Robinson, 1st earl of Ripon was the prime minister of Great Britain from August 1827 to January 1828. He received from the radical journalist William Cobbett the sardonic nicknames “Prosperity Robinson” (for his unwarranted optimism on the eve of the 1825 economic crisis) and “Goody

Frederick John Robinson, 1st earl of Ripon was the prime minister of Great Britain from August 1827 to January 1828. He received from the radical journalist William Cobbett the sardonic nicknames “Prosperity Robinson” (for his unwarranted optimism on the eve of the 1825 economic crisis) and “Goody

George Frederick Samuel Robinson, 1st marquess of Ripon was a British statesman who in more than 50 years of public service occupied important cabinet posts and served as viceroy of India. A liberal administrator acceptable to the Indians, he was thought to have weakened the British Empire but to

George Frederick Samuel Robinson, 1st marquess of Ripon was a British statesman who in more than 50 years of public service occupied important cabinet posts and served as viceroy of India. A liberal administrator acceptable to the Indians, he was thought to have weakened the British Empire but to

English literature: Anglo-American Modernism: Pound, Lewis, Lawrence, and Eliot: …Pound first drew attention in Ripostes (1912), a volume of his own poetry, and in Des Imagistes (1914), an anthology. Prominent among the Imagists were the English poets T.E. Hulme, F.S. Flint, and Richard Aldington and the Americans Hilda Doolittle (H.D.) and Amy Lowell.

Isabel Allende: Other novels and fiction: …El juego de Ripper (2014; Ripper), Allende tells the story of a teenage girl tracking a serial killer.

Juan Guillermo Riperdá, duque de Riperdá was a political adventurer and Spanish minister during the reign of Philip V. Apparently born a Roman Catholic of a noble family, he conformed to Dutch Calvinism in order to obtain his election as delegate to the States General from Groningen. In 1715 he was

fluid mechanics: Waves on deep water: …are generally referred to as ripples. In such waves, the pressure differences across the curved surface of the water associated with surface tension (see equation [129]) are not negligible, and the appropriate expression for their speed of propagation is

smaller water strider, (the latter name derives from the fact that the body, widest at the middle or hind legs, tapers to the abdomen, giving the impression of broad shoulders), any of the approximately 300 species of the insect family Veliidae (order Heteroptera). Smaller water striders—which may

ripple mark, one of a series of small marine, lake, or riverine topographic features, consisting of repeating wavelike forms with symmetrical slopes, sharp peaks, and rounded troughs. Ripple marks are formed in sandy bottoms by oscillation waves, in which only the wave form advances rapidly, the

explosive: Nitramon and Nitramex explosives: …submerged twin-peak mountain known as Ripple Rock, which was only 2.7 metres (9 feet) below the surface at low tide. More than 120 vessels had been lost because of this obstacle. In preparing for the blast, a shaft was sunk on shore to the proper depth. From it a tunnel…

Edward John Dent: …maker’s trade from his cousin Richard Rippon. During the period 1815–29 Dent established a reputation as a builder of accurate chronometers. His fine work eventually brought business from the Admiralty and the Royal Greenwich Observatory. Beginning in 1826, Dent submitted chronometers to the observatory’s annual timekeeping contests, finally winning the…

Gary Snyder: …first two books of poems, Riprap (1959) and Myths and Texts (1960), are images and experiences drawn from his work as a logger and ranger in the U.S. Pacific Northwest. In The Back Country (1967) and Regarding Wave (1969), the fusion of religion into everyday life reflects Snyder’s increasing interest…

saw: …used by the carpenter: the ripsaw, the crosscut saw, and the backsaw. The first two have roughly triangular blades about 50 cm (20 inches) long, 10 cm (4 inches) wide at the handle, and tapering to about 5 cm (2 inches) at the opposite end. Ripsaws are used for cutting…

History of film: Mexico: Other prominent Mexican directors were Arturo Ripstein, whose works included Profundo carmesi (1996; Deep Crimson) and El coronel no tiene quien le escriba (1999; No One Writes to the Colonel), and Alejandro González Iñárritu, who made Amores perros (2000) and Babel (2006) as well as Biutiful (2010) before moving to…

rip current, narrow jetlike stream of water that flows sporadically seaward for several minutes, in a direction normal or nearly normal to a beach. Such currents are probably the cause of most ocean bathing accidents blamed on undertow. The term riptide is often used but is a misnomer, the currents

Germany: Languages of Germany: Ripuarian Franconian begins roughly near Aachen, at the Dutch-Belgian border, and spreads across the Rhine between Düsseldorf and Bonn into the Sauerland.

Frank: …three groups: the Salians, the Ripuarians, and the Chatti, or Hessians. These branches were related to each other by language and custom, but politically they were independent tribes. In the mid-3rd century the Franks tried unsuccessfully to expand westward across the Rhine into Roman-held Gaul. In the mid-4th century the…

Frank: …three groups: the Salians, the Ripuarians, and the Chatti, or Hessians. These branches were related to each other by language and custom, but politically they were independent tribes. In the mid-3rd century the Franks tried unsuccessfully to expand westward across the Rhine into Roman-held Gaul. In the mid-4th century the…

Pierre-Paul, Baron Riquet de Bonrepos was a French public official and self-made engineer who constructed the epochal 240-km (149-mile) Midi Canal (also called the Languedoc Canal) connecting the Garonne River to the Aude River, thus linking the Atlantic Ocean and the Mediterranean Sea. The canal

André-Boniface-Louis Riqueti, viscount de Mirabeau was the brother of the famous orator, the comte de Mirabeau, and one of the reactionary leaders at the opening of the French Revolution. Sent to the army in Malta in 1776, he spent part of his two years there in prison for insulting a religious

Honoré-Gabriel Riqueti, comte de Mirabeau was a French politician and orator, one of the greatest figures in the National Assembly that governed France during the early phases of the French Revolution. A moderate and an advocate of constitutional monarchy, he died before the Revolution reached its

Victor Riqueti, marquis de Mirabeau was a French political economist, the forerunner and later patron of the Physiocratic school of economic thought. He was the father of the renowned French revolutionary, the Comte de Mirabeau. After serving as an officer in the War of the Polish Succession

comedy: Bergson’s and Meredith’s theories: …comedy in his essay “Laughter,” which deals directly with the spirit of contradiction that is basic both to comedy and to life. Bergson’s central concern is with the opposition of the mechanical and the living; stated in its most general terms, his thesis holds that the comic consists of…

South Asian arts: Tovil dance: The most terrible is Riri Yakka (Demon of Blood), who inhabits cremation grounds and graveyards and rides a pig. His belly is smeared with blood, and he has a monkey’s face and four clawed hands that hold a parrot, a sword, a rooster, and a human head.

spectroscopy: Resonance-ionization spectroscopy: Resonance-ionization spectroscopy (RIS) is an extremely sensitive and highly selective analytical measurement method. It employs lasers to eject electrons from selected types of atoms or molecules, splitting the neutral species into a